Abstract
This study has been aimed to explore the effect of dye concentration, cell thickness, and polymers on the characteristics of random laser (emission spectrum, full width at half maximum (FWHM), and lasing threshold). It has been found that the properties of the random laser are affected by these three parameters significantly, as it was observed that the emission spectrum reached its best value when adding the of polyvinylpyrrolidone polymer. As for the FWHM and the laser threshold, their value decreased from 38 to 35 nm and from 0.71 to 0.68 A respectively after adding the polymeric material. These results were achieved at concentration of 5×10–4 M and cell thickness 0.1 cm. Improving the properties of random lasers is considered a significant step in creating optical devices useful in medical applications and biosensors.
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